A totipotent cell:
a. is fixed into a single developmental pathway.
b. has homeotic transformation.
c. can differentiate into any adult cell.
d. will become a stem cell.
C
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Some invertebrates do not have special respiratory
organs and rely on __________ exchange, diffusion of gases across the body surface. Fill in the blank(s) with the appropriate word(s).
With each turn of the Krebs cycle, ____
a. the majority of ATP are produced b. oxygen is produced c. carbon dioxide is utilized d. NADH and FADH2 are produced e. pyruvate is produced
Progymnosperms had two derived features:a
microphylls and herbaceous tissue. b. microphylls and woody tissue. c. megaphylls and herbaceous tissue. d. megaphylls and woody tissue. e. both megaphylls and microphylls and herbaceous tissue.
When light strikes a rod cell, rhodopsin:a
breaks down into opsin and retinal. b. changes color. c. acts as a second messenger. d. depolarizes the cell membrane. e. stimulates a cone cell.